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C++ streambuf - pubsync
Description
It is used to synchronize stream buffer and calls the protected virtual member sync.
Declaration
Following is the declaration for std::basic_streambuf::pubsync.
int pubsync();
Parameters
none
Return Value
It returns the default definition of sync in streambuf always returns zero, indicating success.
Exceptions
Basic guarantee − if an exception is thrown, the stream buffer is in a valid state.
Data races
It modifies the stream buffer object.
Example
In below example explains about std::basic_streambuf::pubsync.
#include <iostream> #include <fstream> int main () { std::ofstream ostr ("sample.txt"); if (ostr) { std::streambuf * pbuf = ostr.rdbuf(); pbuf->sputn ("First sentence\n",25); pbuf->pubsync(); pbuf->sputn ("Second sentence\n",26); ostr.close(); } return 0; }
streambuf.htm
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